Why are so many people feeding a suggesting Innova EVO?

when i bought it, i mixed it with the innova. the dog food is a little ..rich.. and unless you work your dogs, it should be mixed. i have a mastiff and a rhodesian ridgeback, and the mixture was fine for them. i would have to travel a bit to buy it now, so i keep my girls on solid gold. maybe not as good as innova, but they like it and i do not have to spend a fortune in gas to get it.